I have a probem in that a pdf is cuaing IE/FF to freeze, and Chrome to say various things like [code]

An appropriate representation of the requested resource /images/stories/coinstreet/conferencebrochure.pdf could not be found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.[/code]. Sometimes Chrome will just say "can't download pdf". I know for certain that the pdf is on the server.

Oddly Opera and Safari are fine. I have re-encoded and tried several computers.

I should also say that there are lots of other pdfs on the site and most of them are absolutely fine.